Spike.



L. L. SESSAGRANT.

SPIKE.

APPLICATION FILED DEC. 24, 1907.

Patented Nov. 24, 1908.

the side faces of the gula-r shoulder to a Fig.

PATENT QFFICE.

LIBBIE L. SESSAGRANT, OF LANSINGBURG, NEW YORK.

SPIICEL.

Specification of Letters Patent.

Patented Nov. 24, 1908.

Application filed. December 24, 1907. Serial No'. 407,965.

it) all whom it may concern:

Be it. known that I, LIBBIE L. SESSAGRANT, citizen of the United States, residing singburg, county of Rensselaer, and State'of New York, have invented certain new and useful Improvements in Spikes,.of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to a spike, and particularly to a construction thereof having retainingprojections upon its body to prevent either vertical or lateral movement of the spike after being driven.

The invention has for an object to provide a novel and improved construction of the body of the spike with an enlarged portion havmg thereon a wedge-shaped projection increasing in width downwardly and curved toward the center of the body to form one face of a pyramidal point, the opposite side of said point being parallel thereto, While point are disposed at an angle diagonal to the first mentioned face.

Another object of the invention is to provide an improved construction of angular ribs at the opposite sides of the spike having their lower ends merged into the body of the spike to facilitate the driving thereof, and the upper portion therof formed with an anprevent vertical movement.

Other and further objects and advantages of the invention will be hereinafter set forth and the novel features defined by the ap; pended claims.

In the drawing:--Figure 1 a perspective of the invention; Fig. 2 is an elevation of the right side of Fig. 1; Fig. 3 is a similar view of the front of the spike; Fig. 4. is an elevation of the opposite side from Fig. 2; is a similar view of the back of the spike;,Fig. 6 is a, cross section on the line 6--6, Fig. 1; Fig. 7 is a similar view on the line7- 7, Fig. 1; Fig. 8 is an elevation of the point of the spike.

Like numerals refer to like parts in the several views of the drawing.

The numeral 10 designates the body of the spike which is provided with the usual head 11 havingthe toe 12 adapted to engage the rail or other object to be held. The face 13 beneath this head is plane without either projections or depressions thereon, and will be termed thefrqlnt face of the spike. The opposite or rear face 14. is provided intermediate of the ends of the spike with the sounder 15, and the lower portion 16 is of at Langreater diameter than the upper portion and Y is formed with an enlarged portion to prevent vertical movement of the spike, this eni largement being solely upon the rear face of the spike so as to permit a straight downward drive of the front face thereof. Upon the portion 16 the wedge shaped projection 17 is formed which has an inclined face 18 at the top and increases downwardly in widthtoward the point where it is curved l inward to form one face 19 of the pyramidal point 20 of the spike, asshown in Figs. 1 and 2. The lower portion of the front face 13'is likewise beveled inward toward the 1 center of the spike as shown at 21 thus formmg the opposite face of the point. The side faces 22 and 23 are each similar in construction and provided with ribs 24 having a shoulderor angular face 25 at their upper ends and tapered or merged into the body of the spike at their lower ends 26 to facilitate the driving. The lower end 27 of each side face is beveled at an anglediagonal to that of the front and rear f cos of the point to form its sides.

It will be seen that a spike constructed in accordance with this invention can be economically produced by the usual methods and when driven the straight front face permits the intimate contact thereof with the rail or other object, while the enlarged lower portion with the wedge shaped projection thereon effectually prevents'creeping or vertical movement of the spike as the fiber of the wood expands and embraces these portions. The wedge shaped projection 17 by becoming embedded in the wood material assists in this function, while the side walls thereof prevent a twisting or movement toward either side of the driven spike. The ribs upon the side walls of the spike not only prevent the movement of the same toward and from the rail, but also a vertical movement thereof, while the tapered lower ends of these ribs permit easy driving without crushing the wood fiber as would occur with an angular lower end and thus permits the fiber to expand into contact with the rib. The pyramidal point assists the driving by having a sharp point of entrance which with the side faces of the point inclined at an an le diagonal to the front and rear faces produced a straight driving and overcomes any dan er of the point traveling away from a straig it line by equalizing the resistance of the enlarged lower portion and the holding ribs thereon. It will thus be 1 seen that the invention presents a simple, efficient and economically constructed spike adapted to be effectually retained: against movement in the body of the wood when driven therein. 1

-Having forth its meritsywhat I claim and desire to secure by Letters Patent is 2- 1. A spike having its rear face provided intermediate of its ends with a shoulder and an enlarged portion extending therefrom to the point and having a wedge shaped projection increasing in width downwardly and curved toward the center of the body to form one face ofa pyramidal point.

2. A spike provided upon the lower portion of its rear face with a wedge shaped projection increasing in width downwardly and curved toward the center of the body to form one face of a pyramidal point, a plane front face upon said spike, and longitudinal ribs provided upon the opposite side faces I thereof.

3. A spike provided upon the lower portionof its rear face with a wedge shaped projection increasing .in width downwardly and curved toward thecenter of the body to form one face of a pyramidal point, a plane front face upon said spike, and longitudinal described my invention and set'\ acacia] ribs provided upon the opposite side faces thereof the lower ends of said side faces be ing inclined at an angle diagonal to that of the rear face of the pyramidal point.

a; A spike provided upon the lower portion of its rear face with a wedge shaped projection increasing in width downwardly and curved toward; the center of the body to form one face of a pyramidal point, a plane front face upon said spike, ribs provided upon the opposite side faces of said spike tapered into the body at their lower ends and provided with an angular shoulder at their upper ends. v

5. A spike provided with a straight, plane front face and an a shoulder intermediate of its ends, an enlarged lower portion extending to the point thereof, a wedge shaped projection disposed upon said rear face increasing in width downwardly toward said point, and longitudinal ribs disposed upon the side faces of said spike and merged into the body thereof at their lower ends.

. In testimony whereof I affiX my signature in presence of two witnesses. I v

' LIBBIE L. 'SESSAGRANT. Witnesses y 1 GEORGE F. Qi'mcKnN-Btisrr, F. W. TRULAND.

and longitudinal opposite rear face having. 

